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A013000
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arctan(arctan(x)+tan(x))=2*x-16/3!*x^3+808/5!*x^5-99328/7!*x^7...
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0
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2, -16, 808, -99328, 22756480, -8373489408, 4518380796928, -3361577372366848, 3297920024665948160, -4125214890387616169984, 6407889739355365222383616, -12101572905129973895312965632
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OFFSET
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0,1
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LINKS
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[ArcTan[ArcTan[x]+Tan[x]], {x, 0, nn}], x]Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, May 05 2012 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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EXTENSIONS
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STATUS
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approved
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